Manufacture of knitted warp fabrics



May 7, 1929. T. VORCK ET AL MANUFACTURE OF KNITTED WARP FABRICS Filed July 50, 1927 s. "M 3% n; T 2 Tr m R TTORNEYS I Patented May 7, 1929. j I g UNITED STATES PATENT OFFICE.

THEODOR VORCK AND PAUL ZIMMERMANN, OF BARMEN, GIElRMANY.

MANUFACTURE OF KNITTED FABRICS.

Application filed July 30, 1927, Serial No. 209,425, and in Germany November 5, 1926.

The present invention relates to the manufacture of knitted warp fabrics having rib threads, and according to the main feature thereof, only one row of needlesis employed to incorporate in the fabric both front and back weft threads.

Knitted warp fabrics containing rib threads and both front and back weft threads, are known, but they have hitherto required two rows of needles, one for the front and one for the back of thefabric. present it has never been proposed to attempt the insertion of a plurality of wefts, with only one row of needles, as is accomplished by the present invention. Among the objects of the present invention are to enable many new designs of fabric to be produced, with a considerably increased output, and to permit the manufacture of first class knitted fabrics having rubber warp threads, which. are particularly suitable for the manufacture of corsets, straps and braces. A further object isto enable high class tapestry or Gobelin, 'and. brocade effect decora tions to be made, as well as fabrics for cu'r tains, hanging and upholstery fabrics, with or without a plush surface, and fancy and shoe upper stuffs orv cloths, and straps or belts of all kinds.

In order that the invention may be elearly understood and readily carried into practice, we have appended hereto a sheet of drawings in which the figure illustrates the run of the threads in a warp knitted fabric manufactured according to the invention, the weft threads being for the sake of clearness, shown straightened out.

Referring to the drawing, the Warp threads a form stitches, in known manner, alternate-fthreads, so that d is located in front, Whilst qd is disposed at the back. Thus whilst d is disposed between the back stitch loops on the one hand and the warps b on the other hand, d is'di'sposed between the front stitch loops and the rib warps b.

- It is also possible to insert in the fabric rib stitches in the drawing) which run along, in-

Up to the stead of between the stitch courses, these threads being tightly embraced by stitch loops drawn down-alternately from right and left thereof, so that the stitch loops not only encircle the two wefts d d, but also embrace the rib warp'thread 6'. Consequently the threads 6 are constrained to take a sinuous formation and are gripped very tightly in position in the fabric. An important advanta e of the invention in this connection lies in the fact that the figuring weft like warp threads do not have to run through the groundof the fabric, so as to be what is called dead material, hut only appear in the figures or designs themselves, whereby the effect of a real Gobelin tapestry is obtained, which is not the case'with a woven imitation.

The rib threads for non-elastic fabric do not, of course, consist of rubber, but consist of any other suitable non-elastic material; they may be coloured or may be efl'ect threadsof many varied kinds, because if several Weft threads are omitted, then the rib threads become apparent, and can be made use of in a pattern effect.

What we claim is 2- v 1. A method of manufacturing knitted warp fabrics, wherein a single row of needles is employed to form parallel warp courses of interlooped stitches, rib warp threads are runbetween said courses, a pair of weft threads are run on opposite sides of said rib warp threads but both behind the needles, whereafter the next stitch loops placedin the needles are drawn down to encircle said pair of weft threads.

2. A method as set forth in the first claim, wherein the knitted warp threads form alter- .nate stitches in different courses of stitches.

- 3. A method of manufacturing knitted warp fabrics, wherein a single row of needles is employed to form parallel warp courses of interlooped stitches, rib warp threads are run along said courses of stitches, a pair of weft threads are run on opposite sides of said rib warpthreadsbut both behind the needles, whereafter the next stitch loops placed in the needles are drawn down to en-( circle said pair of weft threads, consecutive warp knitting loops being drawn down alternately on opposite sides of" the rib warp threads so as additionally to hold same in position.

4. Knitted warp parallel longitudinal warp courses of interlooped stitches, pairs of 'weft threads enfabric having. spaced.

circled and held down by the warp stitch loops, and rib warp threads running freely between the longitudinal courses of stitches and freely between the weft threads of each air.

5. Knitted warp fabric having spaced parallel longitudinal Warp courses of interlooped stitches, consecutive stitches being formed by different warp threads, pairs of Weft threads encircled and held down by the warp stitch loops, and rib warp threads running freely between the longitudinal courses of stitches and freely between the weft threads of each pair.

6. Knitted warp fabric having spaced parallel longitudinal warp courses of interlooped stitches, pairs of weft threads encircled and held down' by the warp stitch loops, and rib threads running freely between the weft threads of each pair, but running along the warp courses of stitches, alternate stitches of which, are drawn down from opposite sides of the rib threads so that the latter are encircled and gripped thereby.

In testimony whereof we have signed our names to this specification.

. THEODOR VORCK.

PAUL ZIMMERMANN. 

